Click here to see the SAS code.
Click here to see the example.

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This example demonstrates how to use Michael Friendly's ellipses()
macro to draw ellipses on a gplot.

I have enhanced the macro slightly, to allow the use of SAS 9.3 
alpha-transparent colors (I had to lengthen the color variable),
and I made the poly/polycont annotated areas style='solid'
(rather than the default empty/outline ones).

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